Get ready for the patented, tangible power of Crusher Bass – now available in a double pack with the ultimate sound customization "Personal Sound" from our partners at Audiodo. You’ve never experienced your music and movies like this before, because there’s nothing quite like it. The Skullcandy Crusher offers a unique, immersive bass experience that you can not only hear but also feel. Slide the dial down for softer bass. Slide it up for bass that hits deep. Your hearing is as unique as you are. That’s why the Crusher Evo features Personal Sound. With a quick real-time test using the Skullcandy app, you can create a personal sound profile that is stored on your headphones to tailor the sound to your hearing. The Audiodo technology in the Skullcandy app analyzes the hearing in your left and right ear and automatically adjusts the sound to the optimal level for your specific hearing. This way, you can experience nuances you’ve never heard before. The Crusher Evo comes with a built-in Tile tracking feature. If you misplace your headphones, you can easily "call" them through the Tile app. This way, you can quickly find your lost earbuds. To ensure you don’t have to constantly recharge your headphones, the Crusher Evo offers 40 hours of battery life. Plus, the "Rapid Charge" fast charging feature provides an additional 3 hours of listening pleasure after just 10 minutes of charging.